spark plug tube fouling? (1 Viewer)

[Jesse Berdinka]

I just finished my first tune up and every thing went very well and the truck runs great..

I have a question, however, about the spark plug tubes. When I took the number 3 plug out, the whole inside of the tube had a fine white crust on the inside. the other tubes were clean.

I checked all the plugs and they all appear normal except for the crud in this one tube.

Does anyone know what may have caused this?

Thanks.

 

[Scamper]

Have no idea, though you may have had a bad wire that was arching once in a while which could oxidize the tube. If you haven't yet(i.e., if you're tune up didn't include wires), then call Dan and get a replacment wire set.

 

[Jesse Berdinka]

Thanks. That was the thought I had. I did replace the wires, and I checked the old ones. They were actually good, but since I was baselining the vehicle I went ahead and replaced them.

Thanks for the thoughts.